https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67062
--- Comment #2 from Luke Allardyce <lukeallardyce at gmail dot com> --- --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 or i686-w64-mingw32 I can't remember if it broke on either or both of the above targets and don't have access to an OSX machine any more. --build was left unspecified, the auto detection worked.